package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Mapper;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(public * com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void pointCut() {}

    @Before("pointCut()")
    public void autoFill(JoinPoint joinPoint) throws Throwable {
        log.info("开始进行公共字段自动填充...");

        //方法签名对象
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();

        //获得注解中信息
        AutoFill autoFill=signature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = autoFill.value();

        Object[] args = joinPoint.getArgs();

        if(args==null||args.length==0){
            return ;
        }

        //约定第一个参数位实体类
        Object arg = args[0];
        LocalDateTime now = LocalDateTime.now();
        Long id = BaseContext.getCurrentId();


        Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
        Method setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
        Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
        Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);

        if(value==OperationType.INSERT){

            setCreateTime.invoke(arg, now);
            setCreateUser.invoke(arg, id);
            setUpdateTime.invoke(arg, now);
            setUpdateUser.invoke(arg, id);

        }
        else if(value==OperationType.UPDATE){
            setUpdateTime.invoke(arg, now);
            setUpdateUser.invoke(arg, id);
        }


        //log.info(joinPoint.toLongString());



    }
}
